public class Test9 {
    public static void main(String[] args) {
        Object locker=new Object();
        Thread t1=new Thread(()->{
            synchronized (locker){
                System.out.println("t1wait之前");
                try {
                    locker.wait();
                } catch (InterruptedException e) {
                    throw new RuntimeException(e);
                }
                System.out.println("t1wait之后");
            }
        });
        Thread t2=new Thread(()->{
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                throw new RuntimeException(e);
            }
            synchronized (locker){
                System.out.println("t2notift之前");
                locker.notify();
                System.out.println("t2notify之后");
            }
        });
        t1.start();
        t2.start();
    }
}
